dwc3_alloc_event_buffers(9)

💖 dwc3_alloc_event_buffers — the Kernel API Manual era 💖

okay so bestie, welcome to the <pink>Kernel API Manual</pink> ✨ and today's main character is dwc3_alloc_event_buffers(9) — literally the function that gets you one event buffer of size length. she's giving setup-girlie energy and we're obsessed 🎀

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✨ NAME ✨

dwc3_alloc_event_buffers — ngl the name kinda spoils it, but: it allocates one event buffer of size length 🦋

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🌸 SYNOPSIS 🌸

int dwc3_alloc_event_buffers (struct dwc3 *dwc , unsigned int length );

like, that's the whole signature, no cap 💅

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🎀 ARGUMENTS 🎀

• dwc — pointer to our controller context structure. yes bestie it's our controller, we're emotionally attached 🫶
• length — size of event buffer. that's the size. of the event buffer. iconic of her honestly ⭐

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💜 DESCRIPTION 💜

so here's the tea, fr fr: it returns 0 on success, otherwise a negative errno 😭

⚠️ and in the error case, real talk — dwc may contain some buffers allocated but not all which were requested. so she tried her best, she got partway there, and now it's your problem. not a full slay, more of a partial slay 💀

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/usb/dwc3/core.c
• dwc3_get_dr_mode(9)
• dwc3_core_soft_reset(9)
• dwc3_ref_clk_period(9)
• dwc3_free_one_event_buffer(9)
• dwc3_alloc_one_event_buffer(9)
• dwc3_free_event_buffers(9)
• dwc3_event_buffers_setup(9)
• dwc3_phy_setup(9)
• dwc3_core_init(9)

like, the whole dwc3 friend group showed up to the function call 🌈👑

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mwah 💋 — this page lives over in ./drivers/usb/dwc3, dated October 2026, and it's dwc3_alloc_event_buffers(9) forever and ever. k bye bestie, go free your buffers 🧚💖